Production process of high-temp resistant bismuth vanadate yellow ceramic pigment

A technology for yellow pigments and ceramic pigments, applied in inorganic pigment treatment, bismuth compounds, fibrous fillers, etc., can solve problems such as obstruction, health pollution, and excessive dissolution, and achieve the effect of reducing costs, eliminating hazards, and brightening colors.

Inactive Publication Date: 2007-10-03
SHIJIAZHUANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method that can eliminate the harm to the health of workers and the pollution to the environment caused by the production of pigments and solve the problem that my country's export of ceramic products is blocked due to the excessive dissolution of toxic heavy metals such as lead, cadmium, and chromium. Problematic high temperature resistant bismuth vanadate yellow ceramic pigment production process

Method used

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  • Production process of high-temp resistant bismuth vanadate yellow ceramic pigment
  • Production process of high-temp resistant bismuth vanadate yellow ceramic pigment
  • Production process of high-temp resistant bismuth vanadate yellow ceramic pigment

Examples

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preparation example Construction

[0029] (1) Yellow pigment BiVO 4 Preparation of:

[0030] A. Prepare 0.5-2.0mol / L Bi(NO 3 ) 3 Solution 100-1000mL, need to add 5-200mL concentrated HNO when preparing 3 to inhibit Bi(NO 3 ) 3 hydrolysis;

[0031] B. Add NH 4 VO 3 Dissolved in 1-8mol / L NaOH solution to obtain the same Bi(NO 3 ) 3 Solution isotropic NH 4 VO 3 Solution 100-1000mL;

[0032] C. Under stirring, mix 100-1000mL NH 4 VO 3 The solution was added dropwise to the same volume of Bi(NO 3 ) 3 In the solution, adjust the pH to 4.5-7.5 with sodium hydroxide or ammonia water, raise the temperature to 60-100°C and then keep it warm for 0.5-2.0 hours, then carry out suction filtration, wash with distilled water to wash away impurity ions, 60-100°C Dried to obtain loose powdery bismuth vanadate yellow pigment;

[0033] (2) SiO 2 Sol preparation:

[0034] Prepare 0.05-0.50mol / L Na 2 SiO 3Solution 400-2000mL, warm up to 60-90°C under stirring, then add 1-10% H 2 SO 4 solution, adjust the pH=5....

Embodiment 1

[0076] The present invention comprises following technological process:

[0077] (1) Yellow pigment BiVO 4 Preparation of:

[0078] A. Prepare 0.5mol / L concentration of Bi(NO 3 ) 3 Solution 100mL, need to add 10mL concentrated HNO when preparing 3 to inhibit Bi(NO 3 ) 3 hydrolysis;

[0079] B. Add NH 4 VO 3 Dissolved in 1mol / L NaOH solution to obtain Bi(NO 3 ) 3 Solution isotropic NH 4 VO 3 Solution 100mL;

[0080] C. Under stirring, 100mL NH 4 VO 3 The solution was added dropwise to the same volume of Bi(NO 3 ) 3 In the solution, adjust the pH to 4.5 with sodium hydroxide or ammonia water, heat up to 100° C. and then keep it warm for 1.0 hour, then perform suction filtration, wash with distilled water, and dry at 80° C. to obtain loose powdery bismuth vanadate yellow pigment;

[0081] (2) SiO 2 Sol preparation:

[0082] Prepare 0.10mol / L Na 2 SiO 3 Solution 400mL, heated to 60°C under stirring, then added dropwise 5% H 2 SO 4 Solution, adjust pH=5.2, af...

Embodiment 2

[0087] The present invention comprises following technological process:

[0088] (1) Yellow pigment BiVO 4 Preparation of:

[0089] A. Prepare 2.0mol / L concentration of Bi(NO 3 ) 3 Solution 1000mL, need to add 200mL concentrated HNO when preparing 3 to inhibit Bi(NO 3 ) 3 hydrolysis;

[0090] B. Add NH 4 VO 3 Dissolved in 8mol / L NaOH solution to obtain the same Bi(NO 3 ) 3 Solution isotropic NH 4 VO 3 Solution 1000mL;

[0091] C. Under stirring, 1000mL NH 4 VO 3 The solution was added dropwise to the same volume of Bi(NO 3 ) 3 In the solution, adjust the pH to 6.2 with sodium hydroxide or ammonia water, heat it up to 60°C and then keep it warm for 2.0 hours, then perform suction filtration, wash with distilled water, and then use organic solvents such as absolute ethanol, ether, carbon tetrachloride, Wash with chloroform or acetone, and dry at 60°C to obtain loose powdery bismuth vanadate yellow pigment.

[0092] (2) SiO 2 Sol preparation:

[0093] Prepare ...

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Abstract

This invention relates to production process of pucherite yellow ceramic pigment, which takes sodium silicate as raw material to coat silicon dioxide. It takes sodium silicate as silicon source, coat silicon dioxide on surface of pucherite. For the strong inertia of silicon dioxide, it be able to withstand 1000 deg high temperature, and keep bright-colored after annealing of 1000 deg. This invention can eliminate harm to human body and pollution to environment in the process of production, solve the problem of heavy metal content are overproof in the export ceramic product of our country.

Description

technical field [0001] The invention relates to a production process of bismuth vanadate yellow ceramic pigment coated with silicon dioxide by using sodium silicate as raw material. Background technique [0002] The existing yellow ceramic pigments have the following types: cadmium yellow (CdS), chrome yellow (PbCrO 4 , BaCrO 4 ), antimony yellow (Sb 2 o 5 2PbO), Chrome Titanium Yellow [TiO 2 (Cr, Sb)], etc., they all contain toxic heavy metal elements such as lead, chromium, and cadmium. Ceramic pigments containing heavy metals cause direct poisoning to the health of workers during the production process. On the other hand, when the pigments are corroded by acid, the dissolution of heavy metals will also endanger human health. Therefore, it is urgent to develop a kind of green and environment-friendly yellow ceramic pigment. Bismuth vanadate yellow pigment is a new type of pigment with bright prospects. It has excellent properties of non-toxicity, good weather resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/08C09C3/06C01G29/00C01G41/00C01B33/14C04B41/85
Inventor 张星辰次立杰张萍魏青段书德赵建录许保恩杨晓辉
Owner SHIJIAZHUANG UNIVERSITY
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